Polycrystalline Hf_2Fe and Hf_2Co as cathode materials in the electrolytic hydrogen production

摘要

U ovom radu su ispitivane intermetalne faze prelaznih metala, Hf_2Fe i Hf_2Co, kao katode u procesu elektrolitičkog dobijanja vodonika. Dobijena su značajna smanjenja utroška energije u odnosu na katode koje se primenjuju u industrijskim procesima, Fe i Ni. Eksperimentalno dobijene elektrokatalitičke efikasnosti primenjenih katodnih materijala i dalji teorijski proračuni (FP-LAPW) mogu ukazati na puteve nalaženja efikasnijih katodnih materijala što je u skladu sa istraživanjima vezanim za povećanje efikasnosti elektrolitičkog procesa za proizvodnju vodononika.%The intermetallics Hf_2Fe and Hf_2Co were investigated as cathodes in the electrolytic production of hydrogen. A comparison between them and with conventional cathode, nickel, was evaluated and they could be ordered according to their electrocatalytic activity: Hf_2Co > Hf_2Fe > Fe > Ni (the energy requirement is in the inverse order). In order to relate the electrocatalytic activity of Hf_2Co and Hf_2Fe with some of their electronic properties, all-electron full-potential linearized augmented plane wave (FP-LAPW) calculations were performed, and the obtained results were discussed.